It used to be very common to put tile up on whatever the wall was and seal the the tile.
Tiling over plaster walls bathroom.
You should not tile over wallpaper glossy surfaces lead paint or plywood.
If you have a tiling job to do in your bathroom and the walls have been skimmed with plaster you have.
The problem otherwise is that grout is porous and any slight crack will cause moisture and mold on any other surface.
Follow manufacturer instructions to a tee.
Tiling on a plaster wall tiling on plaster.
This was back in the 80 s.
The adhesive and tile will block moisture from evaporating.
If you re not sure if you have lead paint test kits are available.
It is important to check the weight of your tiles as plaster skim has a 20kg per square meter weight ratio.
If plaster is any way compromised you should tear out to studs and start over.
Add a diverter and shower line in the wall.
However tiling over tile can add quite a bit of thickness so make sure your wall can handle the weight.
Bring plumbing to code.
But with cement board.
You would have to remove the plaster and replace it not with drywall run from a contractor who says that.
I have repaired tile jobs that were over 20 years old that the tile was applied directly to regular sheetrock and plaster walls.
You may tile over existing tile painted or unpainted drywall plaster and textured walls.
Tiling over damp plaster causes the wall to fail because the plaster won t become strong if it can t dry out.
Fresh plaster whether applied as a patch or to the entire wall must dry completely before tile is applied.
That is true you cannot tile over plaster if that s your plan.